It went to hell in 2019. I remember because it took a lot of search to tell that I'm not alone, and understand why.

Apparently, two kinds of rabbit holes caused suggestions to break: conspiracy theories and elsagate. I also read that it could guide pedophiles to accidentally "relevant" videos of children.

Basically, if you help people find videos the same way ants find food, some undesirable behaviour emerge. You can follow paths that are not intended to be followed, and it can get platforms in hot water.